An introduction to how the turbine flowmeter works

The turbine flowmeter consists of a turbine, a bearing, a preamplifier, and a display instrument.
The fluid to be tested impinges on the turbine blade to rotate the turbine. The rotational speed of the turbine changes with the change of the flow rate, that is, the flow rate is large, and the rotational speed of the turbine is also large. Then, the rotational speed of the turbine is converted into an electrical pulse of the corresponding frequency by the magnetoelectric conversion device. After the preamplifier is amplified, it is sent to the display instrument for counting and display. The instantaneous flow rate and the accumulated flow rate can be obtained according to the number of pulses per unit time and the cumulative number of pulses.
The working principle of the turbo transmitter is that when the fluid flows along the axis of the pipe and impacts the turbine blades, a force proportional to the flow rate qv, the flow velocity V and the fluid density ρ is applied to the blades to push the turbine to rotate. While the turbine is rotating, the blades periodically cut the magnetic lines of force generated by the electromagnets to change the magnetic flux of the coils. According to the principle of electromagnetic induction, a pulsating potential signal is induced in the coil, and the frequency of the pulsating signal is proportional to the flow rate of the fluid to be measured.
The pulse signal output by the turbo transmitter can be measured by amplifying the signal after being amplified by the amplifier and sent to the display instrument.